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Finding the Fourth Proportional to 39,164.90, 54,047.63 and 21,259.90

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Solution

The fourth proportional to 39,164.90, 54,047.63 and 21,259.90 is: 29,338.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,164.90 : 54,047.63 = 21,259.90 : x
  2. Step 2: Convert to fraction form
    39,164.90/54,047.63 = 21,259.90/x
  3. Step 3: Cross multiply
    39,164.90x = 54,047.63 × 21,259.90
  4. Step 4: Simplify right side
    39,164.90x = 1,149,046,967.62
  5. Step 5: Solve for x
    x = 1,149,046,967.62/39,164.90
  6. Step 6: Final answer
    x = 29,338.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.